Pupil size at different times of the day
- Thread starter Dragunov
- Start date
You may want to consider that the other advantage of a larger exit pupil is the ease with which you can find the image in your binoculars... small exit pupil requires more critical eye alignment and can be annoying... one of the reasons that a 7x, 50 is favorite with sailors..boat movement makes alignment even more difficult.
For many years the military (infantry anyway) used 6x,30. They were prepared to give up power (which really isn't too big a deal) to get exit pupil (5mm with a 6x,30) in a relatively compact package with excellent FOV ... which is the other key to finding things ... good FOV improves the chances of seeing movement ... one of the major reasons "things are seen" .. anyway for most legal hunting hours 3mm is probably the minimum.... your age will also dictate how much exit pupil illumination you can "use"
For many years the military (infantry anyway) used 6x,30. They were prepared to give up power (which really isn't too big a deal) to get exit pupil (5mm with a 6x,30) in a relatively compact package with excellent FOV ... which is the other key to finding things ... good FOV improves the chances of seeing movement ... one of the major reasons "things are seen" .. anyway for most legal hunting hours 3mm is probably the minimum.... your age will also dictate how much exit pupil illumination you can "use"
I have never heard of such a table. I don't think it would be as useful as knowing the maximum size of your pupil's opening. Yours may open more or less than is typical, and whatever your best ever was, as we get older we all lose some capacity. And your pupils will reduce or enlarge according the the light available, regardless of the time of day, so there wouldn't be much point showing pupil size relative to sunrise or sunset since other conditions can cause variations in the light level during any sunrise or sunset period.
I use 7x50, but for all I know, my eyes may not be able to take full advantage of the 7mm exit pupil exit pupil this offers.
7 mm is commonly cited as the typical maximum for adults, hence the traditional guideline that a 7 mm exit pupil is the largest that can be useful towards getting maximum brightness in your optics. (A 6x42mm or 8x56mm will give the same exit pupil as a 7x50, but 7x was traditionally accepted as the most magnification that most people could use unsupported for extended periods without tiring their eyes too much because higher magnification will make the shaking of your hands too obvious.
I use 7x50, but for all I know, my eyes may not be able to take full advantage of the 7mm exit pupil exit pupil this offers.
7 mm is commonly cited as the typical maximum for adults, hence the traditional guideline that a 7 mm exit pupil is the largest that can be useful towards getting maximum brightness in your optics. (A 6x42mm or 8x56mm will give the same exit pupil as a 7x50, but 7x was traditionally accepted as the most magnification that most people could use unsupported for extended periods without tiring their eyes too much because higher magnification will make the shaking of your hands too obvious.
I should've specified the purpose. I'm not looking to hunt with them. When I start hunting I'd get myself a leica and forget about the whole binoculars issue.
It's mostly for daytime use.
I guess I'll carry around a little mirror for a while. lol
It's mostly for daytime use.
I guess I'll carry around a little mirror for a while. lol
